Question about Kenmore Microwave Ovens

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Microwave oven will not heat. Everything else works.

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  • imgolfing2da Mar 06, 2009

    Yes, the light and turntable work fine as does the timer display. The first time we noticed it wasn't heating, there were no odd noises. The next time we tried it however, it made a loud buzzing noise and a low sounding pop so we haven't messed with it again. The model # is 665-6861 1891 (Kenmore) 1000 watt.

  • imgolfing2da Mar 09, 2009

    Your site is awesome. I am sure you nailed the problem but I decided to purchase a new microwave after your warnings of electrical shock. I don't have any negative feedback for you at all and I have already told a few other people to give you a try. Cheers!

  • William Miller
    William Miller May 11, 2010

    When you hit Start to
    cook, do the inside light and turntable come on?

    Any unusual noises? Is it louder or quieter than usual?
    We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.http://www.microwavedisplay.com/mwd_ad_a...
    What is the model number?
    These answers will help me judge whether it\'s in the high voltage
    section (magnetron, transformer, or diode) or the control section
    (door switch or control board relay or connection).

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  • Kenmore Master
  • 8,820 Answers

With the symptoms you
have, especially with that pop, I would most strongly suspect a shorted high voltage rectifier
diode.

The diode is a fairly cheap & easy fix.
If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

There should be a "mini-manual" (tech sheet) hidden inside the unit
behind the control panel or hidden on the left side behind the grille, which is
very helpful when troubleshooting, testing, and locating components.


Microwave oven will not heat. Everything else - d:%5cele%5crepair%5cmicrowave%5cge_hotpoint%5cmini_manual_behind_grille_small.jpgdee77f7.jpg


At our Web site, we have a video
available showing how to remove a typical
over the range control panel assembly in under 5 minutes.


Here are some links you
or someone you know can use for test help, but read their safety
warnings first:

http://www.microtechfactoryservice.com/diode.html
(if it\'s not shorted or burned, it\'s probably okay)


http://www.microtechfactoryservice.com/cap_test.html
http://www.microtechfactoryservice.com/mag_test.html
http://www.microtechfactoryservice.com/xformer.html

You can usually find
exploded views and order parts by entering your model number
(665.68611891) at the Sears parts site.

We\'re happy to help you with free advice and we\'d appreciate your thoughtful rating of our answer.

Posted on Mar 06, 2009

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